Corrupt sketch up scene in Blender?

melviso

I imported a sketch up geometry into Blender using this addon:
https://blenderartists.org/forum/showthread.php?360406-Sketchup-(SKP)-importer

The scene imports fine but anytime I try to use this addon:
https://blenderartists.org/forum/showthread.php?417608-Addon-Texel-Density-Checker-1-0-2-UPDATE

This error comes up:

Does anyone know what might be causing this and a fix for it? Is the scene corrupt? Because when I create a new scene and try the texel density addon using 3 primitive cubes. It works fine.

melviso

Found solution. Export the scene as .fbx file after importing with the sketchup addon. Reimport the fbx file into a fresh new scene, try the Texel density addon and it will work fine.
I don't know why I didn't try this. Spent a whole day trying to figure this out.